============================== C-One FAQ ===============================v0.9

Important Note:
please contibute to this FAQ adding infos/correction/news you believe is needed.
My english need to be corrected too (as you well know already :)
Most of the following it token from emails I had with Jens..

============================================================================


- Which monitor do I need to attach to my C-ONE board?
A multiscan monitor should be perfect, anyway is higly suggested to use a monitor who can handle 50hz frequency
The Amiga is 100% exact, so it will give the exact VSync frequencies as a real Amiga. 
This results in 49,9Hz for PAL, and your monitor might not like that. So:
NTSC= 60   Hz.
PAL = 49,9 Hz.
Most PC monitors require 60Hz. Some work with 50Hz, and none I know work with 49,9Hz. 
We might tweak the PAL core to output 50,3Hz to get around that problem. 
All I can say at the moment is "hang on - we're working on it!".  (06-Dec-2008)


- how many c-one have been selled in the world?
It's roughly 100 units

- Which kickstart version should I use with FPGA-Minimig cores?
Any Kickstart for A500/A2000 should be OK. To avoid A4000/A3000/A1200 versions
At the actual develop of cores, 1.3 have more compatibility than the highest versions.

-Original kickstart v1.3 is 256K size, but I've read 512K version  is required. True?
Right, the 1.3 version must be copied twice in a row into a single file for the older 
cores, but the newest should work with both.. 

-How can I change the boot picture? I would like know which core (folder) I'm launching
There isn't any PNG->RAW converter yet, but you can add text files to the pictures. 
The picture is called "select.raw" and you can add a text file "select.txt" that is overlaid
over the core picture. See the select.txt file in the c64_2 directory of the archive.

-My C-One board doesn't boot any Amiga core. What can I do?
Take out any C64 cartridge and SDRAM module, if present. 
Also, there's the possibility of a flaky power supply. 
The C-One doesn't require much power, but it must be stabilized very well. 
The C-One relies on the power supply to comply with ATX standard, 
and that includes very low ripple on 3.3V and 5V
This is an example of well working config of C-One board:
The SD-Ram (DIMM) socket is empty.
The CPU/RAM card is in the CPU slot.
The PCI slot is empty and the C64 expansion slot is empty.
Is there a 1G "silicon power 120x" CF card, or an 8MByte (yes, that small!) which is branded "Feiya". 
Keyboard is noname, monitor is the Eizo Flexscan.

-What are the power reqs for the c-one?
12V less than 100mA with two SIDs installed.
3.3V less than 1 amp with SD-Ram module installed, less if you don't
install SD-Ram.
5V depends very much on SID and cartridge installation, but my guess is
that you're totally fine with 1 amp.
I'd have to check the schematics if the negative voltages are used at all.
Can anyone help out? If -12V is used, then it's somewhere in the audio
part, but since there are no op amps in that circuit (at least not that I
can remember), I guess it's all positive voltages.
In other words: Choose the smalles PSU you can find, but make sure that
the "power good" signal works like on all ATX power supplies.


(Last edit 07-12-2008)